If the head over the triangular notch is doubled, the discharge will increase by ______________ times?
Correct answer: C. 5.657
- A. 2
- B. 2.828
- C. 5.657
- D. 4
Explanation
For a triangular (V-notch) weir, discharge varies as H^(5/2). Doubling the head therefore multiplies discharge by 2^(5/2) = 5.657.
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